<template>
  <view v-if="goods_info.goods_name">
    <!-- 轮播图区域 -->
    <swiper :indicator-dots="true" :autoplay="true" :interval="2000" :duration="1500" :circular="true">
      <swiper-item v-for="(item, i) in goods_info.pics" :key="i">
          <image :src="item.pics_big"  @click="preview(i)"></image>
      </swiper-item>
    </swiper>
    
    <!-- 商品信息区域 -->
    <view class="goods-info-box">
      <!-- 商品信息 -->
      <view class="price">￥{{goods_info.goods_price}}</view>
      <!-- 商品信息主题区域 -->
      <view class="goods-info-body">
        <!-- 商品名字 -->
        <view class="goods-name">{{goods_info.goods_name}}</view>
        <!-- 收藏 -->
        <view class="like">
          <uni-icons type="star" size="18" color="gray"></uni-icons>
          <text>收藏</text>
        </view>
      </view>
      <!-- 运费 -->
      <view class="yf">快递: 免运费</view>
    </view>
    
    <rich-text :nodes="goods_info.goods_introduce"></rich-text>
    
    
    <!-- 商品导航组件区域 -->
    <view class="goods_nav">
      <uni-goods-nav :fill="true"  :options="options" :buttonGroup="buttonGroup"  @click="onClick" @buttonClick="buttonClick" />
    </view>
    
  </view>
</template>

<script>
  import { mapState, mapMutations, mapGetters } from 'vuex'
  
  export default {
    computed: { 
      ...mapState('m_cart', ['cart']),
      ...mapGetters('m_cart', ['total'])
    },
    watch: {
      // total(newVal) {
      //   const findResult = this.options.find(x => x.text === '购物车')
        
      //   if(findResult) {
      //     findResult.info = newVal
      //   }
      // }
      
      total: {
        handler(newVal) {
          const findResult = this.options.find(x => x.text === '购物车')
          if(findResult) {
            findResult.info = newVal
          }
        },
        immediate: true
      }
    },
    data() {
      return {
        // 商品详情对象
        goods_info: {},
        
        // uni ui 的goods_nav 组件配置项
        options: [{
          icon: 'headphones',
          text: '客服'
        }, {
          icon: 'shop',
          text: '店铺',
          info: 0, 
          infoBackgroundColor:'#007aff',
          infoColor:'red'
        }, {
          icon: 'cart',
          text: '购物车',
          info: 0,
        }],
        buttonGroup: [{
          text: '加入购物车',
          backgroundColor: '#ff0000',
          color: '#fff'
        },
        {
          text: '立即购买',
          backgroundColor: '#ffa200',
          color: '#fff'
        }
        ]
        
      }
    },
    methods: {
      ...mapMutations('m_cart', ['addToCart']),
      
      async getGoodsDetail(goods_id) {
        const { data: res } = await uni.$http.get('/api/public/v1/goods/detail', { goods_id } )
        // console.log(res)
        if(res.meta.status !== 200) return uni.$showMessage()
        
        // 1. 解决图片间的空白间隙      2. webp图片格式在ios有兼容问题
        res.message.goods_introduce = res.message.goods_introduce.replace(/<img /g, '<img style="display: block;" ' ).replace(/webp/g, 'jpg')
        
        this.goods_info = res.message
      },
      // 轮播图点击时触发  uni.previewImage()事件
      preview(i) {
        uni.previewImage({
          current: i,
          urls: this.goods_info.pics.map(x => x.pics_big)
        })
      },
      onClick (e) {
        uni.showToast({
          title: `点击${e.content.text}`,
          icon: 'none'
        })
        if(e.content.text === '购物车') {
          uni.switchTab({ url: '/pages/cart/cart' })
        }
      },
      buttonClick (e) {
        // console.log(e)
        // this.options[2].info++
        if(e.content.text === '加入购物车') {
          // 组织商品的信息对象
          // { goods_id, goods_name, goods_price, goods_count, goods_small_logo, goods_state }
          const goods = {
            goods_id: this.goods_info.goods_id,
            goods_name: this.goods_info.goods_name,
            goods_price: this.goods_info.goods_price,
            goods_count: 1,
            goods_small_logo: this.goods_info.goods_small_logo,
            goods_state: true
          }
          this.addToCart(goods)
        }
      }
    },
    onLoad(options) {
      // console.log(options)
      const goods_id = options.goods_id
      this.getGoodsDetail(goods_id)
      
    },


  }
</script>

<style lang="scss">
swiper {
  height: 750rpx;
  
  image {
    width: 100%;
    height: 100%;
  }
}

.goods-info-box {
  padding: 10px;
  .price {
    color: #c00000;
    font-size: 18px;
    margin: 10px 0;
  }
  
  .goods-info-body {
    display: flex;
    justify-content: space-between;
    
    .goods-name {}
    font-size: 13px;
    margin-right: 10px;
    
    .like {
      width: 120px;
      font-style: 12px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      border-left: 1px solid #efefef;
      color: gray;
    }
  }
  
  .yf {
    font-size: 12px;
    color: gray;
    margin: 10px 0;
  }
}

.goods_nav {
  position: sticky;
  bottom: 0;
  left: 0;
}
</style>
